CN109683075A - A kind of insulating materials local discharge test device - Google Patents
A kind of insulating materials local discharge test device Download PDFInfo
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- CN109683075A CN109683075A CN201910165502.2A CN201910165502A CN109683075A CN 109683075 A CN109683075 A CN 109683075A CN 201910165502 A CN201910165502 A CN 201910165502A CN 109683075 A CN109683075 A CN 109683075A
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- liquid nitrogen
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
Insulating materials local discharge test device in the application, including test cavity interconnected and liquid nitrogen container, one end setting of high-field electrode is in test cavity, one end is external in test cavity, ground electrode one end is immersed in liquid nitrogen container, one end setting is in test cavity, insulating materials to be measured is clipped between high-field electrode and ground electrode, high temperature is adjusted using the Resistant heating of high-field electrode package, ground electrode directly soaks the liquid nitrogen height adjustment low temperature in liquid nitrogen container, Resistant heating power and liquid nitrogen height are controlled by temperature feedback regulating device, insulating materials to be measured is set to keep certain temperature, it realizes and the temperature of insulating materials partial discharge test is controlled, and then realize the environment of the big temperature gradient from insulating materials from high temperature to low temperature, improve the accuracy of insulating materials partial discharge test.
Description
Technical field
This application involves electric system electrical insulating materials to test characterization technique field, more particularly to a kind of insulating materials
Local discharge test device.
Background technique
Hyperconductive cable, which refers to, utilizes one kind cable made of superconductor.Hyperconductive cable has large capacity, low-loss, saves energy
The advantages such as source and environmental protection, have been widely used in the power system.The insulating materials of hyperconductive cable ontology and its terminal is bearing height
While field strength, also the big temperature gradient by extreme temperature conditions and low temperature to high temperature is tested.In this case, in order to protect
Hinder the trouble-free operation of electric system, whether the insulating materials for needing to detect hyperconductive cable ontology and its terminal deteriorates.Due to
The main reason for shelf depreciation is that insulating materials mechanical strength is caused to decline, insulation degradation, therefore, is locally put by insulating materials
Electric test can Analysis of Superconducting insulating materials performance.
In the prior art, insulating materials local discharge test device includes liquid nitrogen plan and high-field electrode, by liquid nitrogen plan
Temperature is controlled as the cold source for maintaining partial discharge test low temperature environment, and by the rate of circulating flow of control liquid nitrogen.In the skill
In art, first liquid nitrogen plan is placed in the cabinet of small enclosed, then, the insulating materials for connecting high-field electrode is equally placed
In the cabinet, added high pressure by high-field electrode to insulating materials, the local discharge signal of test insulating materials under high pressure,
The performance of insulating materials is determined by the local discharge signal.Wherein, liquid nitrogen plan includes the liquid nitrogen circulatory system and flow control
System processed.
But inventor has found in the research process of the application, is filled using existing insulating materials partial discharge test
It sets when being tested, the use environment of the big temperature gradient of hyperconductive cable can not accurately be simulated, it can only be in single low-temperature test
At a temperature of carry out partial discharge test, and then cause insulating materials partial discharge test inaccurate.
Summary of the invention
A kind of insulating materials local discharge test device disclosed in the embodiment of the present application, to solve existing insulating materials office
When portion's discharge test device is tested, the use environment of the big temperature gradient of hyperconductive cable, Zhi Neng can not accurately be simulated
Partial discharge test is carried out at a temperature of single low-temperature test, and then leads to the problem of insulating materials partial discharge test inaccuracy.
The embodiment of the present application provides a kind of insulating materials local discharge test device, comprising:
It is anti-to test cavity, liquid nitrogen container, high-field electrode, ground electrode, the first temperature sensor, second temperature sensor and temperature
Present regulating device；
The test cavity is detachably arranged in the top of the liquid nitrogen container, and the test cavity is vacuum cavity, institute
State the earthing of casing of liquid nitrogen container；
One end of the high-field electrode is located in the test cavity body, and it is external that the other end is located at the test cavity, the height
Piezoelectricity pole is provided with resistance wire, institute for providing high pressure required for insulating materials partial discharge test on the high-field electrode
Resistance wire is stated for heating the high-field electrode；Wherein, the intracorporal high-field electrode end of the test cavity is provided with first
Temperature sensor, first temperature sensor are used to acquire the temperature of the high-field electrode；
One end of the ground electrode is fixed in the support of the bottom in the liquid nitrogen container, and the other end is located at the test cavity
It is interior；Wherein, the intracorporal ground electrode end of the test cavity is provided with second temperature sensor, the second temperature sensor
For acquiring the temperature of the ground electrode；Insulating materials to be measured is placed in first temperature sensor and second temperature sensor
Between；
The temperature feedback regulating device connects first temperature sensor and second temperature sensor, the temperature are anti-
Feedback regulating device is used to receive the temperature of first temperature sensor and second temperature sensor transmission, and according to the temperature
The heating power of the resistance wire or the liquid nitrogen height of the control liquid nitrogen container are controlled, the temperature of insulating materials to be measured is kept
In preset temperature, the big gradient temperature control of insulating materials partial discharge test is realized.
Optionally, the high-field electrode includes high-field electrode guide rod, and the high-field electrode guide rod material is heat-conducting metal.
Optionally, the ground electrode includes ground electrode guide rod, and the ground electrode guide rod material is heat-conducting metal.
Optionally, the high-field electrode is fixed on the upper cover plate of the test cavity by bushing, the high pressure
Inside pipe casing is provided with spring structure, the spring structure cooperation screw rod and nut, for adjusting the height of the high-field electrode；
The upper cover plate is detachably arranged on the test cavity, is equipped with handle on the upper cover plate.
Optionally, be additionally provided on the test cavity: vacuum pumping port, pressurization mouth, shut-off valve, Pirani gauge, ionization gauge and
Pressure vacuum gauge；The Pirani gauge connects the pressure vacuum gauge with ionization gauge, and the shut-off valve is arranged at the pressurization mouth；
The vacuum pumping port connects aspiration pump, and the vacuum pumping port is used to the test cavity keeping vacuum state；
The pressurization mouth is used to pressurize to the test cavity；
The shut-off valve is for controlling the pressurization mouth folding；
The Pirani gauge and ionization gauge are used to measure the pressure of the test cavity；
The pressure vacuum gauge is used to show the pressure of the Pirani gauge and ionization gauge.
Optionally, the test cavity surrounding is additionally provided at least one quartz glass observation window, and the quartz glass is seen
Window is examined for observing the insulating materials to be measured in the test cavity.
Optionally, the liquid nitrogen container is provided with liquid nitrogen pipe, pressure gauge and liquid level sensor；
The liquid nitrogen pipe is for outputting and inputting the liquid nitrogen in the liquid nitrogen container；
The pressure gauge is used to show the pressure in the liquid nitrogen container；
The liquid level sensor is used to monitor the liquid level in the liquid nitrogen container.
Optionally, the liquid nitrogen pot bottom is additionally provided with castor, and the castor is for moving the liquid nitrogen container.
Optionally, first temperature sensor and second temperature sensor are patch type temperature sensor.
Insulating materials local discharge test device in the application, including test cavity interconnected and liquid nitrogen container are high
One end setting of piezoelectricity pole is in test cavity, and one end is external in test cavity, and ground electrode one end is immersed in liquid nitrogen container, and one end is set
It sets in test cavity, insulating materials to be measured is clipped between high-field electrode and ground electrode, the resistance wrapped up using high-field electrode
Silk heating adjusts high temperature, and ground electrode directly soaks the liquid nitrogen height adjustment low temperature in liquid nitrogen container, controlled by temperature feedback regulating device
Resistant heating power and liquid nitrogen height make insulating materials to be measured keep certain temperature, realize to insulating materials shelf depreciation
The temperature of test controls, and then realizes the environment of the big temperature gradient from insulating materials from high temperature to low temperature, improves insulation material
Expect the accuracy of partial discharge test.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is a kind of main view sectional view of insulating materials local discharge test device provided by the embodiments of the present application；
Fig. 2 is a kind of side view cross section figure of insulating materials local discharge test device provided by the embodiments of the present application.
Wherein, 101- tests cavity；1011- bushing；1012- handle；1013- vacuum pumping port；1014- pressurization mouth；
1015- shut-off valve；1016- Pirani gauge；1017- ionization gauge；1018- pressure vacuum gauge；1019- quartz glass observation window；102-
Liquid nitrogen container；1021- liquid nitrogen pipe；1022- pressure gauge；1023- liquid level sensor；1024- castor；103- high-field electrode；104-
Electrode；The first temperature sensor of 105-；106- second temperature sensor；107- temperature feedback regulating device.
Specific embodiment
In order to make the above objects, features, and advantages of the present application more apparent, with reference to the accompanying drawing and it is specific real
Applying mode, the present application will be further described in detail.
A kind of insulating materials local discharge test device disclosed in the embodiment of the present application, to solve existing insulating materials office
When portion's discharge test device is tested, the use environment of the big temperature gradient of hyperconductive cable, Zhi Neng can not accurately be simulated
Partial discharge test is carried out at a temperature of single low-temperature test, and then leads to the problem of insulating materials partial discharge test inaccuracy.
Referring to Figures 1 and 2, a kind of insulating materials local discharge test device is shown, comprising:
Test cavity 101, liquid nitrogen container 102, high-field electrode 103, ground electrode 104, first the 105, second temperature of temperature sensor
Spend sensor 106 and temperature feedback regulating device 107；
The test cavity 101 is detachably arranged in the top of the liquid nitrogen container 102, and the test cavity 101 is true
Cavity body, the earthing of casing of the liquid nitrogen container 102.
Wherein, the test cavity 101 can realize minimum 10 according to the requirement of experimental condition-3Pa vacuum and highest
The vacuum degree of 0.5MPa realizes the requirement of different vacuum degrees using the filling of the gas of different air pressures.
One end of the high-field electrode 103 is located in the test cavity 101, and the other end is located at the test cavity 101
Outside, the high-field electrode 103 is for providing high pressure required for insulating materials partial discharge test, on the high-field electrode 103
It is provided with resistance wire, the resistance wire is for heating the high-field electrode 103；Wherein, the height in the test cavity 101
103 end of piezoelectricity pole is provided with the first temperature sensor 105, and first temperature sensor 105 is for acquiring the high-voltage electricity
The temperature of pole 103.
Wherein, different tests temperature may be implemented in the power adjustable of the resistance wire, the power by adjusting resistance wire.
Optionally, the high-field electrode 103 outside the test cavity 101 connects transformer, the effect of the transformer
It is to provide high voltage to high-field electrode 103.
Optionally, the high-field electrode 103 includes high-field electrode guide rod, and the high-field electrode guide rod material is thermally conductive gold
Belong to, high-field electrode guide rod diameter is 20mm, and cross-sectional area can meet the demand for heat to insulating materials.
One end of the ground electrode 104 is fixed in the support of the bottom in the liquid nitrogen container 102, and the other end is located at the examination
It tests in cavity 101；Wherein, 104 end of ground electrode in the test cavity 101 is provided with second temperature sensor 106,
The second temperature sensor 106 is used to acquire the temperature of the ground electrode 104；Insulating materials to be measured is placed in first temperature
It spends between sensor 105 and second temperature sensor 106.
Wherein, bottom support connection liquid nitrogen container shell and liquid nitrogen container liner, therefore, the ground electrode 104 passes through bottom branch
Support is grounded with liquid nitrogen container cage connection, i.e., the effect of the described ground electrode 104 is to make entire insulating materials shelf depreciation device
Ground connection, optionally, the ground electrode 104 include ground electrode guide rod, and the ground electrode guide rod material is heat-conducting metal, and ground electrode is led
Shank diameter is 20mm, and cross-sectional area can meet the cooling requirement to insulating materials.
Optionally, first temperature sensor 105 and second temperature sensor 106 are patch type temperature sensor, example
Such as, TP100 temperature sensor.
The temperature feedback regulating device 107 connects first temperature sensor 105 and second temperature sensor 106,
The temperature feedback regulating device 107 is used to receive what first temperature sensor 105 and second temperature sensor 106 were transmitted
Temperature, and the heating power of the resistance wire or the liquid nitrogen height of the control liquid nitrogen container 102 are controlled according to the temperature, make
The temperature for surveying insulating materials is maintained at preset temperature, realizes the big gradient temperature control of insulating materials partial discharge test.
Optionally, the temperature feedback regulating device 107, which can be set, is connecting the insulating materials partial discharge test
In the control device of device, such as: PLC control.The temperature feedback regulating device 107 can be in real time according to the first temperature sensor
105 and the temperature transmitted of second temperature sensor 106, by adjusting the adjusting freezed of liquid nitrogen liquid level or passing through tune
Save the adjusting that resistance wire heating power carries out heats power.
Wherein, the insulating materials partial discharge test in the present embodiment can be such that the temperature of insulating materials ontology to be measured realizes most
The gradient of big 77k to 330k, can meet the use environment temperature of simulation hyperconductive cable completely.
In addition, the high-field electrode 103 and ground electrode 104 in the application can require to be changed to satisfaction test according to different tests
It is required that electrode, the application is not specifically limited.
A kind of insulating materials local discharge test device disclosed in the embodiment of the present application, comprising: test cavity interconnected
Body 101 and liquid nitrogen container 102, one end setting of high-field electrode 103 is in test cavity 101, and one end is outside test cavity 101, ground
104 one end of electrode is immersed in liquid nitrogen container 102, and insulating materials to be measured is placed on test in test cavity 101 by one end setting
It in cavity 101, and is clipped between high-field electrode 103 and ground electrode 104, the Resistant heating tune wrapped up using high-field electrode 103
High temperature is saved, ground electrode 104 directly soaks the liquid nitrogen height adjustment low temperature in liquid nitrogen container 102, passes through temperature feedback regulating device 107 and controls
Resistant heating power and liquid nitrogen height make insulating materials to be measured keep certain temperature, realize to insulating materials shelf depreciation
The temperature of test controls, and then realizes the environment of the big temperature gradient from insulating materials from high temperature to low temperature, improves insulation material
Expect the accuracy of partial discharge test.
Further, the refrigeration in the application does not need the liquid nitrogen circulatory system and flow control system, reduces into
This, meanwhile, compared to existing refrigerating method, refrigeration speed is fast in the application, and high-efficient, liquid nitrogen consumption is few, and, refrigeration continues
Time is long.
Optionally, the high-field electrode 103 is fixed on the upper cover plate of the test cavity 101 by bushing 1011
On, the bushing 1011 is internally provided with spring structure, the spring structure cooperation screw rod and nut, described for adjusting
The height of high-field electrode 103.
Wherein, by the spring structure in the adjusting bushing 1011, the height of the high-field electrode 103 is adjusted,
It can guarantee coming into full contact with for high-field electrode 103 and tested sample upper surface.
The upper cover plate is detachably arranged on the test cavity 101, and handle 1012 is equipped on the upper cover plate.
Wherein, the handle 1012 may be configured as 4, and the handle 1012, which facilitates, is lifted up the upper cover plate, just
In replacement insulating materials to be measured.
Optionally, it is additionally provided with aviation socket on the upper cover plate of the test cavity 101, such as: 31 core aviation sockets, institute
Aviation socket is stated for by the extraction of the first temperature sensor 105 and the transmission line of second temperature sensor 106, the aviation to be inserted
Seat connection control device.
Optionally, be additionally provided on the test cavity 101: vacuum pumping port 1013, pressurization mouth 1014, shut-off valve 1015,
Pirani gauge 1016, ionization gauge 1017 and pressure vacuum gauge 1018；The Pirani gauge 1016 and ionization gauge 1017 connect the vacuum
Pressure gauge 1018, the shut-off valve 1015 are arranged at the pressurization mouth 1014；
The vacuum pumping port 1013 connects aspiration pump, and the vacuum pumping port 1013 is for keeping the test cavity 101
Vacuum state；
The pressurization mouth 1014 is used to pressurize to the test cavity 101；
The shut-off valve 1015 is opened and closed for controlling the pressurization mouth 1014；
The Pirani gauge 1016 and ionization gauge 1017 are used to measure the pressure of the test cavity 101；
The pressure vacuum gauge 1018 is used to show the pressure that the Pirani gauge 1016 and ionization gauge 1017 measure.
Wherein, by the cooperation of vacuum pumping port 1013, pressurization mouth 1014 and shut-off valve 1015, it can be achieved that in vacuum cavity not
With the environment of air pressure.
Optionally, 101 surrounding of test cavity is additionally provided at least one quartz glass observation window 1019, the quartz
Glass window 1019 is used to observe the insulating materials to be measured in the test cavity 101.
In addition, the quartz glass observation window 1019 can cooperate infrared imaging, ultraviolet imagery, one in pulse current method
Or multiple measurement means, insulating materials Characteristics of Partial Discharge is accurately and effectively characterized.
Optionally, the liquid nitrogen container 102 is provided with liquid nitrogen pipe 1021, pressure gauge 1022 and liquid level sensor 1023；
The liquid nitrogen pipe 1021 is for outputting and inputting the liquid nitrogen in the liquid nitrogen container 102；
The pressure gauge 1022 is used to show the pressure in the liquid nitrogen container 102；
The liquid level sensor 1023 is used to monitor the liquid level in the liquid nitrogen container 102, the liquid level sensor
The 1023 connection temperature feedback regulating devices 107, the liquid level sensor 1023 will be in the collected liquid nitrogen container 102
Liquid level real-time Transmission is to the temperature feedback regulating device 107.
Optionally, 102 bottom of liquid nitrogen container is additionally provided with castor 1024, and the castor is for moving the liquid nitrogen container
102。
Castor movement of insulating materials shelf depreciation device convenient for liquid nitrogen container 102 or entirely.
In the present embodiment, by test cavity 101 on be arranged vacuum pumping port 1013, pressurization mouth 1014, shut-off valve 1015,
Pirani gauge 1016, ionization gauge 1017 and pressure vacuum gauge 1018 come control it is described test cavity 101 vacuum degree, liquid nitrogen container 102
Liquid nitrogen pipe 1021, pressure gauge 1022 and the liquid level sensor 1023 of upper setting monitor the liquid level in the liquid nitrogen container 102.
Combine detailed description and exemplary example that the application is described in detail above, but these explanations are simultaneously
It should not be understood as the limitation to the application.It will be appreciated by those skilled in the art that without departing from the application spirit and scope,
A variety of equivalent substitution, modification or improvements can be carried out to technical scheme and embodiments thereof, these each fall within the application
In the range of.The protection scope of the application is determined by the appended claims.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910165502.2A CN109683075A (en) | 2019-03-05 | 2019-03-05 | A kind of insulating materials local discharge test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910165502.2A CN109683075A (en) | 2019-03-05 | 2019-03-05 | A kind of insulating materials local discharge test device |
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| CN109683075A true CN109683075A (en) | 2019-04-26 |
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| CN201910165502.2A Pending CN109683075A (en) | 2019-03-05 | 2019-03-05 | A kind of insulating materials local discharge test device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110488170A (en) * | 2019-08-21 | 2019-11-22 | 哈尔滨理工大学 | A kind of electrode system for plate insulation sample breakdown test |
| CN113092952A (en) * | 2021-03-08 | 2021-07-09 | 河北工业大学 | Experimental device and method for electrical performance of insulating material under large temperature gradient and extremely low temperature |
| CN113671237A (en) * | 2021-08-17 | 2021-11-19 | 国网上海市电力公司 | Handover test and evaluation method for high temperature superconducting cables |
| CN113835006A (en) * | 2021-09-24 | 2021-12-24 | 南方电网科学研究院有限责任公司 | Test method, device and application of step temperature rise test for thermosetting epoxy insulating parts |
| CN114675149A (en) * | 2022-04-06 | 2022-06-28 | 青岛科技大学 | Device and method for simulating discharge test of power equipment |
| CN114839485A (en) * | 2022-04-15 | 2022-08-02 | 国网河南省电力公司超高压公司 | Partial discharge test system for epoxy insulating material of basin-type insulator |
| CN115015711A (en) * | 2022-06-08 | 2022-09-06 | 中车青岛四方车辆研究所有限公司 | EMUs high tension apparatus testing arrangement that discharges |
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| CN113671237A (en) * | 2021-08-17 | 2021-11-19 | 国网上海市电力公司 | Handover test and evaluation method for high temperature superconducting cables |
| CN113835006A (en) * | 2021-09-24 | 2021-12-24 | 南方电网科学研究院有限责任公司 | Test method, device and application of step temperature rise test for thermosetting epoxy insulating parts |
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| CN114839485A (en) * | 2022-04-15 | 2022-08-02 | 国网河南省电力公司超高压公司 | Partial discharge test system for epoxy insulating material of basin-type insulator |
| CN115015711A (en) * | 2022-06-08 | 2022-09-06 | 中车青岛四方车辆研究所有限公司 | EMUs high tension apparatus testing arrangement that discharges |
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Application publication date: 20190426 |